BMW E60 E87 E90 LCI 120d 320d 520d N47 177HP Engine ECU Kit DDE 7812500 CAS3 Key

The BMW E60 E87 E90 LCI 120d 320d 520d N47 177HP Engine ECU Kit DDE 7812500 CAS3 Key is a complete engine control kit designed for select BMW models with the N47 engine producing 177 HP and an automatic transmission. The kit includes the DDE engine control unit, the CAS3 module, and a matched key, facilitating the restoration of proper powertrain operation after an electronic failure. This is a practical solution for workshops specializing in the BMW brand and for owners seeking a reliable, used set for repair or replacement.

Specifications and technical data

• SKU: 7812500-4
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7812500
• Substitutable numbers: 13618506199, 8506199, 13617812500, 7812500, 0281015552, 0 281 015 552, 61359147221, 9147221
• Fuel type: Diesel
• Gearbox type: Automatic
• Category: ECUs & Computer Modules

Application and Compatibility with BMW Models

The presented engine control unit kit is designed for BMW 1, 3, and 5 Series E-generation cars equipped with the N47 diesel engine producing 177 HP. It covers E60, E87, and E90 LCI body styles in the 120d, 320d, and 520d variants, allowing for broad application in popular fleet and private configurations. The kit is prepared for operation with an automatic transmission, making it suitable for vehicles requiring full integration of the engine control unit with the transmission control module.

Construction of the DDE ECU Kit with CAS3 and Key

The set includes the DDE engine control unit, the CAS3 module responsible for start authorization, and a matched key. This configuration ensures data consistency for the immobilizer between the control unit, comfort module, and key, significantly simplifying the installation and vehicle startup process after replacement. The kit belongs to the Electronic Control Modules and Units category, meaning it is designed for direct integration with the factory BMW electrical system without the need for additional wiring modifications.

Operating Parameters – Diesel Engine and Automatic Transmission

The offered kit is designed to work with the 177 HP Diesel N47 engine used in the 120d, 320d, and 520d models. The DDE control unit manages the diesel engine's operating characteristics, including injection, turbocharging, and auxiliary systems, in accordance with the manufacturer's original specifications. Its adaptation for an automatic transmission allows for proper communication with the transmission module, which is crucial for smooth gear changes, correct operation of driving modes, and safety systems.

Professional Service Application

The DDE ECU kit with CAS3 and key is particularly useful in situations where the engine control unit is damaged, there are immobilizer issues, or a new key cannot be coded to the vehicle. This complete package allows for efficient restoration of powertrain functionality without the need for lengthy diagnostics of damaged electronics. This solution enables BMW-specialized workshops to reduce repair times and offer customers a technically consistent, factory-compatible set.

Condition and Benefits of Choosing a Used OEM Kit

The product is used, which significantly reduces repair costs compared to purchasing a new control unit and CAS3 module. At the same time, the original BMW manufacturer's specifications are maintained, promoting seamless integration with the vehicle's wiring and onboard systems. Choosing a complete, original ECU kit with a key minimizes the risk of software incompatibility and reduces the need for additional programming compared to mixing components from different vehicles.

If you are planning a comprehensive repair or upgrade of the engine electronics in your BMW and need other parts from the same category, such as control units, comfort modules, or engine management units, check the available parts in the BMW Electronic Control Modules and Units category.

More Knowledge About BMW Electronics

For owners and workshops who want to better understand the operating principles of engine control units, CAS modules, and the iDrive system in BMW 3 and 5 Series models, we recommend a specialized guide describing repairs using salvaged parts. Practical tips on diagnostics, selecting used modules, and safe installation can be found in the article Years of Driving Pleasure – How to Care for iDrive Systems and Electronic Modules in BMW 3 and 5 Series Models Using Salvaged Parts?.